XKR Cab - Ventilated seats vs Bower@Wilkins

[Bossv8]

Yes that's a strange title. Let me explain.

I am on the market for a X150 4.2 XKR cabriolet.
I am proposed two cars with very similar configurations and values.

Except ...

Car 1: early 2010 model with B&W stereo and no ventilated seats
Car 2: late 2009 model with Alpine stereo and ventilated seats

I think ventilated seats are a real plus in a cabriolet (keep you cool when topdown and allow no to use Aircon when topup). But I also am also very fond of music. Not loud music, but good music.

So my question is:
Is the B&W much better than the Alpine?
Is there a perceptible difference in a cabriolet anyways?
Is the B&W a complete different system or is it just different loud speakers?

Thanks.

[Bossv8]

No 4.2 with supercharger.

[Bossv8]

I had that in a Mercedes and an X5 and I liked the fact that i could get cool without using Aircon which I don't bear well.

[Bossv8]

Both are 4.2SC. But ok.

[Bossv8]

Yes. I have that in my Land Rover Discovery 4.